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6 tools · No account needed

Free developer tools

Format JSON, compare code, convert CSV and Markdown, test regular expressions, and encode Base64 in your browser.

Available tools

Regex Tester

Test regex patterns with live highlighting and 12 SEO presets for slugs, UTM params, meta tags, and more.

Developer UtilitiesOpen tool

JSON Formatter

Format, minify, and validate JSON. Includes key sorting and structural stats.

Developer UtilitiesOpen tool

Take the next step with a Tool Studio app

Replylane — WhatsApp conversation tools →

Start with context. Have a better conversation.

EventRail (Beta) — Webhook debugging →

Find the failed event. Get back on track.

Choose a workflow

Compare sitemaps before a website migration →

Build a URL inventory, compare old and new sitemaps, map removed pages to relevant replacements, and verify redirects after launch.

Small utilities for everyday development

Use a formatter to inspect a payload, a converter to move data between formats, or a diff to review what changed. These tools work with the input you provide and keep processing in your browser.

Preview results before copying them into a project. Formatting and conversion can change representation, while schema validity and application-specific requirements still need to be checked in the system that consumes the output.

Common questions

Is Base64 encryption?

No. Base64 is an encoding that anyone can decode. Use appropriate encryption and access controls when confidentiality is required.

What does JSON comparison ignore?

JSON mode in the diff checker normalizes formatting and object key order. Array order remains significant. Line and word modes are available for text comparisons.

Can I upload a file?

Some tools support local file input; others accept pasted text. Supported formats and size limits are shown on the individual tool page.